Kawasaki Ninja 300 mods & upgrades

The Ninja 300 is a 296 cc twin with a deep 2013–2017 aftermarket: race bodywork, rearsets, suspension and ECU flashing are all listed. Vendor listings stop at 2017, so confirm fitment with the seller before ordering for the 2026 bike.

1. Fit a fender eliminator

   New Rage Cycles, Competition Werkes, Puig and Yoshimura list 2013–2017 kits; TST lists 2013–2016. The tail is one fitment across the run in most listings.

   Tail Tidy & Billet

2. Add sliders and spools

   Woodcraft (under-bodywork frame sliders and swingarm spools), Puig R19, Shogun (no-cut sliders), Vortex V3 2.0 and Hotbodies list frame sliders for 2013–2017. GB Racing lists EX300 engine covers for 2014–2017 and a stator cover for 2014–2015, so confirm on a 2013.

   Crash Protection

3. Choose an exhaust

   Akrapovič (carbon fiber slip-on), Two Brothers M-2 (slip-on and full system), M4 (standard-mount slip-on) and Hindle (slip-on and full systems) list 2013–2017 exhausts. Yoshimura lists no R-77 slip-on for this bike.

   Exhaust

4. Fit adjustable levers

   CRG lists folding and R/C Spectrum levers for 2013–2017, and Bonamici lists remote-adjuster levers for the Ninja 300/400/500 (2013–current).

   Levers

5. Upgrade the suspension

   Kawasaki lists a 37 mm telescopic fork (4.7 in travel) and a Uni-Trak shock with 5-way preload (5.2 in). Öhlins lists a NIX 22 mm cartridge kit with springs and an S36 shock (S36HR1C1L) for 2013–2017, and Spears lists an Andreani Misano cartridge kit for the EX300 2013–2017.

   Suspension

6. Change the windscreen

   Zero Gravity lists Corsa, Double Bubble, SR and Sport Touring screens for 2013–2017; Puig lists a Z Racing screen and Hotbodies a windscreen for the same years.

   Bodywork

1. Buy tires in the stock sizes

   Stock is 110/70-17 front and 140/70-17 rear (Kawasaki). Confirm your tire choice is made in a 140/70 before planning around it.

   Tires & Wheels

2. Fit clip-ons, a race throttle and grips

   Woodcraft lists 2013–2017 clip-ons; Spears lists clip-ons with 2.5 in risers and a Domino XM2 race throttle kit for 2013–2017; TechSpec lists a Gripster tank-grip kit for 2013–2017.

   Clip-ons & Throttle

3. Put money into suspension

   Öhlins lists a NIX 22 mm cartridge kit and an S36 shock for 2013–2017; Spears lists the Andreani Misano cartridge kit. Spring for your weight first.

   Suspension

4. Refresh the brakes

   One 290 mm petal disc with a two-piston caliper, and a 220 mm rear disc. Start with pads, a braided line and fresh fluid; Spears lists a rear braided line and an EBC floating front rotor for 2013–2017.

   Brakes

5. Prepare the bike for track use

   Woodcraft (complete rearset kit) or Vortex (adjustable V2) rearsets, Hotbodies or Armour Bodies race bodywork, GB Racing covers, and Driven captive wheel spacers and spools all list 2013–2017.

   Crash ProtectionBodyworkRearsets

6. Regear, then flash with a full system

   Stock is a 520 chain with a 14T front and 42T rear sprocket; Vortex lists steel and aluminum sprockets for 2013–2017. Woolich lists a 2013–2017 package with a bench harness (the ECU comes off the bike) and FTECU lists Data Link flashing kits for 2013–2017.

   DrivetrainExhaustTune

• EX300A (non-ABS)2013–2017

  One generation start to finish: 296 cc twin, steel semi-double-cradle frame, 37 mm fork, single 290 mm petal disc. Colors and the KRT edition changed yearly while the hardware did not, so '2013–2017' listings are the norm. Certain 2013 bikes carry the ECU stall recall (NHTSA 13V-328). Community-reported: racers prefer the non-ABS bike.

• EX300B (ABS)2013–2017

  The same bike with ABS for about $300 more ($4,999 non-ABS versus $5,299 ABS on Kawasaki's 2017 page); check that a brake-line kit lists your ABS version. Curb weight 383.7 lb claimed (379.3 lb non-ABS, 2014 page). Kawasaki US now lists a 2026 Ninja 300 ABS ($4,999 MSRP) with the same 296 cc engine, 37 mm fork, 290/220 mm petal discs and 110/70-17 · 140/70-17 tires; vendor listings and Woolich coverage still stop at 2017.

• EX400 (Ninja 400)2018–2023 (US)

  A different platform, not an update: 399 cc engine, steel trellis frame, 41 mm fork, 310 mm front disc and a 150/60-17 rear tire (Kawasaki spec sheets; the 2023 Ninja 400 ABS sheet prints 150/70). Nothing structural crosses from the 300. The US Ninja 400 was replaced by the Ninja 500 for 2024.